spheroid joint


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ball-and-socket joint

The most freely movable type of synovial joint, in which the ball-like end of one bone (e.g., the humerus, femur) is surrounded by a spherical cartilaginous encasement, or “socket” (e.g., hip joint), or a group of structures that act as a functionally spherical encasement (e.g., shoulder joint), which allows free mobility of the articulating bone.

ball-and-sock·et joint

(bawl-sok'ĕt joynt)
A multiaxial synovial joint in which a more or less extensive sphere on the head of one bone fits into a rounded cavity in the other bone.
Synonym(s): cotyloid joint, enarthrodial joint, enarthrosis, spheroid joint.

spheroid joint

A multiaxial joint with spheroid surfaces.
See also: joint